The buoyant force of air is the upward force exerted by the air on an object placed in it. This force is a result of the difference in pressure between the top and bottom of the object.
The buoyant force of air is considered negligible because air is much less dense than liquids, such as water, and therefore exerts a much smaller upward force on objects placed in it.
No, the buoyant force of air can have a significant effect on objects that are very light or have a large surface area, such as a balloon or a parachute. In these cases, the buoyant force of air must be taken into account.
No, the buoyant force of air affects objects differently depending on their shape, size, and density. Objects that are more dense than air will experience a downward force, while objects that are less dense will experience an upward force.
The buoyant force of air affects the flight of an airplane by providing lift. The shape and angle of the airplane's wings create a difference in air pressure, which results in an upward force that allows the airplane to stay in the air.